Trivia: Brutus secretly sleeps with Julius' daughter Julia, even though she's married to Pompey, and she becomes pregnant by him. In real life Brutus was engaged to Julia before Julius broke the engagement and wed her to Pompey.
Continuity mistake: In chapter 11 when Brutus goes out to take a morning bath and he hears the soldiers cursing over the cold water, the text says Julius rather than Brutus. An error, considering Julius is in a different part of Greece.